Dual Treatment of Real Silk Textile Wastewater Using Batch Electrochemical Coagulation (ECC) and Membrane Filtration for Clean Water Reclamation

The electrochemical degradation of a raw real silk textile wastewater was carried out using iron electrodes in a bipolar arrangement to remove chemical oxygen demand (COD), color, and reclaim clean water. Batch studies with two plate iron electrodes were identified as an optimal operating condition based on ۹۵.۳% COD removal after electrochemical coagulation (ECC) treatment. The presence of sufficient chloride and alkalinity in wastewater showed an increase in COD degradation efficiencies. The iron electrode showed good settling and filterability. Membrane filtration showed ۹۹% removal of COD, ۱۰۰% removal of total suspended solids (TSS), ۹۶.۵% removal of total solids (TS), and ۹۶% of total dissolved solids (TDS) removal. The reject obtained after membrane filtration was ۱۶%, while the permeate obtained was ۸۴%. Water quality improved considerably after both ECC and membrane filtration treatment, achieving a reduction in other water quality parameters, viz., hardness, alkalinity, TS, and chlorides. The results proved the suitability of the combined treatment process for the complete removal of pollutants/contaminants, combining ECC and membrane filtration with ~۹۵% clear water reclamation.

کلیدواژه ها:

Chemical oxygen demand ، electrochemical coagulation ، electrocoagulation ، electrolysis time ، membrane filtration